GraphQL Query Tester – Free Online GraphQL Query Runner & API Explorer

// Response will appear here after making a request
Recent Requests
No request history yet

About GraphQL Tester

The GraphQL Tester is an online tool designed to help developers send GraphQL queries or mutations and instantly inspect the returned JSON response. It provides a clean interface to execute requests, include optional variables and headers, and review results in a readable format.

This tool is especially useful when you want to quickly test or debug GraphQL queries without setting up a full development environment or writing extra code.

It is ideal for frontend developers, backend developers, and anyone working with GraphQL who needs a simple way to validate responses during development.

How the Tool Works

Using the GraphQL Tester follows a straightforward flow:

  1. Enter your GraphQL query or mutation in the editor.

  2. (Optional) Provide variables in JSON format if your query requires them.

  3. (Optional) Add custom headers in JSON format.

  4. Click Send Request to execute the query.

  5. View the formatted JSON response in the response panel.

  6. Access previous requests from the history tab and reload them instantly.

  7. Clear stored history whenever needed.

All actions happen in real time, and results are displayed immediately after execution.

Key Features

  • Execute GraphQL queries and mutations

  • Supports variables in JSON format

  • Supports custom request headers

  • Displays formatted JSON responses

  • Shows response status and execution time

  • Automatic request history per session

  • Reload past requests without re-sending

  • One-click history clearing

  • Responsive layout for desktop and mobile

Technical Details

  • Requests are sent using standard HTTP POST with GraphQL payload structure

  • Variables and headers are parsed as JSON before execution

  • Responses are parsed as JSON when possible, with raw output fallback

  • Response metadata includes:

    • Status code

    • Response time (milliseconds)

    • Response headers

  • Request history is:

    • Stored per browser session

    • Limited to the most recent 50 requests

    • Automatically removed after 24 hours

No database storage is used for request history.

Use Cases

  • Testing GraphQL queries during development

  • Debugging mutations with different variable values

  • Inspecting JSON responses without writing client code

  • Re-running previous queries for comparison

  • Verifying response structure before frontend integration

Why This Tool Is Useful

  • Fast – instant execution and response display

  • Simple – no setup or configuration required

  • Accurate – displays raw server responses without modification

  • Convenient – session-based history saves time during debugging

  • Lightweight – focused only on request execution and inspection

Data & Privacy

  • Requests are processed only to execute the query and return the response

  • No data is permanently stored

  • Request history is temporary and session-based

  • Stored history automatically expires after 24 hours

  • All stored data can be cleared manually at any time

The tool does not use persistent databases or external tracking for request content.

Browser & Device Compatibility

  • Works in all modern browsers

  • Fully responsive layout

  • Optimized for desktop, tablet, and mobile screens

  • Scrollable response and history panels for large outputs

Additional Insights

This tool is intentionally focused on execution and inspection only.
It does not attempt to validate schemas, auto-correct queries, or modify responses. This makes it reliable for developers who want to see exactly what the server returns, without abstractions or assumptions.

GraphQL Query Tester FAQs

Answers to common questions about using the GraphQL Query Tester tool.

You can send GraphQL queries and mutations. The tool executes exactly what you enter and displays the returned response.

Yes. If your query requires variables, you can provide them in JSON format. The tool parses and sends them along with the request.

The tool supports JSON-formatted responses and provides a formatted output viewer for easy debugging.

Yes. You can include custom HTTP headers using JSON format, which is useful for authorization tokens or other request-specific headers.

No. The tool does not validate or modify queries. It sends the query exactly as provided and displays the response returned.

 

Request history is stored per browser session. Each executed request is saved along with its response and metadata for easy reuse.

The tool keeps up to 50 recent requests. Older entries are automatically removed as new ones are added.

No. Clicking a history item loads the saved inputs and displays the cached response without sending a new request.

Yes. You can clear all stored history at any time using the Clear History option.

No. The tool does not store data in a database. All saved data is temporary and session-based.

Yes. The interface is fully responsive and works on modern desktop and mobile browsers.

Related Tools

Popular Tools